Nobsound&reg; Hi-Fi Tube Amplifier, 110V input Voltage, Tubes: EL34*2 + 6N8P*2 +5Z3P*1 , Hi-end Tube Integrated Amplifier, Single Ended, 100% Handmade Well balanced tone: EL34 gives you outstanding highs & mids when 6N9P brings deep lows. Class A Single Ended Amplifier to reduce distortion; Self-Biasing Design; Analog Inputs; Output tags for speaker impedance: both 4ohm & 8ohm. Particularly Ideal for Vocals, Strings, Pipes, and Jazz; 6N9P is well known tube, who has very low noise. The overall appearance of EL34 is very beautiful and noble. Stainless steel and pure real wood perfect combination. chassis shell with 1 mm wire drawing of stainless steel, both strength and appearance are first-class. It can be also a good gift for friends.